Net-SNMP Tutorial -- demons

Net-SNMP provides two server applications, or demons (aka daemons).
These servers usually run in the background on a machine, listening
for incoming packets and, if necessary, responding to them.

Net-SNMP Agent: snmpd

The first daemon is snmpd, which is a
SNMP agent. snmpd
listens for SNMP requests. A typical SNMP agent allows a client to
query information about the device running the SNMP agent. Some
devices also allow configuration to be set via SNMP.

Depending on configuration, snmpd may also act as an
AgentX or
SMUX master agent. If your
situation warrants it, snmpd can even act as a client to
an AgentX master agent.

The Net-SNMP agent can be built to monitor things such as

network traffic

disk space

disk IO

CPU usage

... and more

(Note: not all statistic are available on all platforms)

Net-SNMP Trap Receiver: snmptrapd

The second daemon is snmptrapd, which is a SNMP
notification receiver.
snmptrapd listens for incoming SNMP notifications
(traps and
informs). When a notification
is received, snmptrapd can be configured to